Power lift



Nov. 2 1926.

H. F. TOWNER POWER LIFT Filed Feb. 9, 1925 2 Sheets-Sheet l Nov. 2 1926. 1,605,486

l H. F. TOwNER POWER LIFT Filed Feb. 9, 1925 2 Sheets-Sheet 2 Patented Nov. 2, 1926.

tjlivii STATES HEBER F. TOWNER, OF SANTA ANA, CALIFORNIA.

POWER LIFT.

Application led February This invention relates to improvements in power lifts for implements for working in the ground wherein the power or normal draft of the implement is utilized to raise the tools from the ground.

Power lifts are utilized for automatic raising of ground tools in many different types of implements used for agricultural purposes or for highway construction and like purposes.

When the ground tools are raised it is preferable, and in many cases absolutely necessary, that there be provided some sort of a latch or holding means for holding the tools in this elevated position and when the tools are so raised and held in the elevated position, it is essential that some sort of means be provided for eifecting an easy release of the holding means to allow the ground tools to fallV again to the working position. Many devices have been devised for this purpose and as the tools are usually of very heavy construction, it is essential n that the release of the holding means be edected from a point removed from the implement so that the individual releasing 'the holding means is not in any wise in danger from the fall of the tools.

The general object of this invention is to provide a power lift mechanism having its parts so constructed and organized as to enable the operator to effect, from a distance, an easy lowering of the tools and a positive and effective means whereby the tools are raised through the agency of the normal draft of the implement.

Another object of this invention is to produce a power lift in which means are provided for positively holding the working tools either in the elevated or lowered position so that the tools will of necessity remain in the position desired by the operator, and more particularly stated, to provide a. form of power lift in which the working tools are positively held in the lowered or working position at all times during the use of the tools.

@ther objects and advantagesof this 1nvention will be apparent from the preferreddescription of the combination and novel parts thereof, all of which contribute to produce an efficient power lift mechanism. In the drawings: Fig. 1 is a side elevation of an agricul- Serial No. 7,867.

tural implement embodying this invention showing the working tools held in the elevated position.

Fig.` 2 is a side elevation of an agricultural implement embodying this invention showing the working tools in the lowered or working position.

Fig. 3 is a top plan view thereof.

Fig. 4 is a fragmental end elevation of means provided for holding the working tools in the elevated position.

Fig. 5 is a side elevation of a slide bar as embodied in this invention. p

Figa 6 is a perspective view of means provided in this invention for positively holding the working tools in the lowered position.

l Fig. 7 is a perspective view of the trip mechanism and holdingV means embodied in this invention. Y

In the preferred embodiment of this invention shown in the drawings,-1 indicates a pair of medial frame members and 2 outer frame members. The members 1 and 2 are secured at their terminal ends by any suitable means, such as the bolts 3. The inembers 2 are bowed transversely inward to meet the members 1L Dependingly supported on the rear of the frame members 1 and 2 is a ground working tool 4 mounted on the standard 5. Any suitable form of ground working tool 4 may be mounted on the standard 5 or a plurality of ground workingV tools 4 may be mounted thereon.

' A. crank axle 6 having crank arms 7 and a medial crank portion 8 is journaled on the medial portion of the members 2 in bearings 9. On the transversely extending necks 10 of the crank axle 6 are journaled ground wheelsll which ground wheels 11 are of any suitable construction. Bolted to the ground wheels 11 are ground gripping meinbersy12. Rigidly connected to the ground wheels 11 are power wheels 13 having teeth or shoulders 14 which are adapted to engage a pin 15 for raising the ground working tools 4 from the ground, using the pull or normal draft of a tractor or other suitable draft implement, not shown.

Rigidly secured to the crank axle 6 in axial alignment with the crank portion 8 are fixed stud portions 18 of the crank axle 6, which stud portions 18 are preferably horizontal extensions of the crank portion 8.

Cav

An arm 19 is loosely mounted on each stud portion 18 and extends forward and rearwardly trom each side ot the stud portion 13 of the crank axle 6 and. carries at its i'orward end within a biturcated bracket 2O the pin 15 and is bent inwardly at its rearward. end as illustrated at 21 so as to be in position to engage the adjustable plates which plates 22 are mounted within the clamps secured to the frame members 2 by means of bolts as illustrated at 24. Each plate 22 has a vertically extending portion which tits within the bracket 23 andthe height oft the plate 22 may by this manner ot connection be regulated in relation to the arm 19. Mounted on each stud portion 18 ot the crank axle 6 an arm 16 which is formed integral with a ring 27 which is passed over the portion 18 of the crank axle 6 and is 'tree to rotate thereon torA adjust ment and each arm 16 is provided with a set screw 1'? tor locking it in the adjusted position. Secured to the arm 16 is a nut 23 in which a bolt 29 is screw threaded and which bolt 29 is held in position to engage the upper surface of the arm 19. B-ythis means the position of the pin 15in relation to the shoulders 14 of the power wheels 13 may be regulated by turning the bolt 29 so as to either raise or lower t-he pin 15 thereby changing the angle between the arms 19 and 16. An actuating lever 30 is secured to each arm 19 as illustrated at 31 and the arms 30 are bent inwardly and joined by means of a rod 32. A coil spring 33 is secured at one end of the arm 30 as illustrated at 34 and at its opposite end to the arm 1GA so that the arm 30 is normally urged rearwardly so as to maintain the pins 15 out of engagement with the shoulders 14.

Secured to the portion 8 of the crank axle G by any suitable means, such as welding, is an arm 35 to the upper end of which arm 35 a slide bar 3,6 is pivotally secured by means ot a pin 37, the rearwardend ot which slot-l ted bar 36 is bent rearwardly upon itself to form a bracket into which the end of the arm 35 is adapted to nt as illustrated at 3S.. The slide bar 36 extends 'forward and is adapted to slide within a biturcated bracket 39, which biturcated bracket 39 is mounted on the medial frame members 1. rifhe bar 36 slides on a roller 40 mounted on the pin 41 which pin 41 passes through the bracket 39. A. recess 42 formed as a hook, as illustrated in Fig. 7, is cut in the bar 3G. Mounted on a pin 43 situated above the pin 41 is an arm 44 which arm 44V has a bifurcated clamping end 42 adapted to fit over the biturcated bracket 39. Mounted on the pin 43 is a roller 45. The

'arm 44, after its connection with the pin 43,

has a rearwardly extending portion 4G which carries a pin 47 upon whichvpin 47 a roller 48 is mounted.

llVhen it is desired to hold the ground reoaesc working` tools 4 in the elevated posit-ion, the roller 43 is engaged within the hook recess 42 -formed in the bar 36. rlhe forward end oi the arm 36 is provided with a plurality oi bores 49, any one ot which bores 49 adapted to receive a bolt 50 so that the depth ot' penetration ot' the ground working tools may be adjusted. The bolt 50, when adjusted in the proper hole 49, engages the t'orward edge of the biturcated bracket 39 and prevents further penetration ot the ground working tool Means are provic ed for preventing thc raising o'i the ground working tools 4 when lowered to the position as illustrated in Fig. J

2, and comprises a bar 51 upon which an extension`52 is secured or formed and which bar 51 has a bore 53 through which the bolt 59 passes so as to hold the extension spaced to the rear of the bolt 50. rlhe lower edge of the extension 52 rides upon the upper edge ot the bar 36 and together with the bolt prevents rotation of the bar 51. rEhe extension 52 is by this means held in position to engage the roller 48 when the ground working tools are lowered to the position illustrated in Fig. 2, and being so engaged prevents the ground working tools 4 from lifting during the working ci? the ground therewith. to the end of the extension 4G ci the arm 44 and to one ot the medial frame members 1 and normally urges the roller 48 into engagement with the supper surface ot the arm 36 or holds the same within the hook recess 42. Secured to the rod 32 is a chain which chain 55 is secured at its opposite end to the upper end of the arm 44 in a ring to which ring 56 an operating cable or cord 57l is secured. A biturcated guide 58 is mounted on the pin 47 in position to hold the chain from becoming entangled within the bifurcated bracket 39 or attendant parts.

The medial frame members 1 are extended forward from their connection with the outer trame members 2 and a plate 59 is secured between the members V1 by any suitable means such as theV bolt 60. The plate 59 has a plurality ot bores 61 any one or which may receive a clevis 62, which clevis 62 is adapted to be connected with the tractor or other draft implement. Tl e medial 'trame members 1 likewise extend rearwardly from their connection with the outer trame members 2 and are fitted with a member G3 which member G3 is secured to the members 1 by any suitable means such as the bolts 64. rllhe members 63 have a racc 65 providing an upper bearing surface to cngge the end and sides ot the members 1 an'l a downwardly extending recess 66 for proif'iding abutting surfaces for the upper rearwardedge ot the standard 5. The standard 5 is pivoted betweenthe medial frame members 1 on a pin 67.

A spring 54 is secured 'iin A pair of brace rods 68 are connected at their respective ends to the plates 59 and 68.

The operation of this implement is as follows:

rl`he implement being,` in the position illustrated in Fig. 1, lthat is with the ground working tools 4 in the elevated position, when the operatordesires to lower the same to cultivate the ground, he exerts a pressure upon the cable 57 which raises the roller 48 from within the recess 42 and permits the bar 36 to slide rearwardly within the bifurcated bracket 39 allowing the crank axle 6 to rotate and lower the ground .working tools to the position illustrated in Fig. Q. The implement is then in position to cultivate the ground. rlhe depth of the penetration of the ground working tools 4, is regulated by means of the bolt 50, as hereinbefore described. As the implement is drawn forward, if the same encounters an obstacle which it is not possible to draw the ground working tools 4 through, or which for some reason it is desired to draw the ground yworking` tools 4 through, the implement is backed, which backing allows the standard 5 to swing' forward and in many of these cases it may be desirable to elevate the ground working tools 4 from the ground whereupon the operator, from the seat of the draft implement, again pulls the cord 57 Which operates through the chain to rotate the actuating1 lever 30 to engage the pin 15 with the shoulders 14. As the implement is drawn over the ground, the rotation of the ground wheels 11 on the crank axle 6 elevates the ,around working' tools 4 to the position illustrated in Figi'. 1, at which time the rearward end 21 et the arm 19 engages the plates 22 and as the implement continues its forward motion, th'n pins 15 are withdrawn from engagement with the shoulders 14 and the. spring 54 pulls the roller 48 down into the recess 42 and holds the implement in the elevated. position.

The elevation of the tools, or the position at which it is desired that the roller 48 should be engaged with the recess 4Q- is regulated by means of the bolt 29 so that the moment at which the roller 15 elevates the shoulders 4S is tixed, as in the mann-er heretofore described.

During the transportation o f the implenient it is preferable that means be provided for positively holdingthe Vground working` tool 4 elevated so that there is no danger of the tool falling` and breaking` the point causing;w other damage. For this purpose holes 53d and 53') are formed in the bar 5l and the slide bar 36 in position to align when the bar 51 is properly positioned and e bolt is passed through these holes to engage the edge of the bifurcated bracket 39.

lla-ving yfully described the preferred embodiment of this invention, it is understood that l do not wish to be limited to the exec" description as herein set forth, but various modifications may be made without departing; from the spirit of the invention, and the invention is ofthe scope set forth in the appended claims.

l claim:

1. ln an implement of the class described, the combination of a frame, a crank axle journaled in bearings transversely of the frame, wheels journaled on the axle, a ground working tool supported by the frame, means for rocking the crank axle, a standard secured to the frame, an arm pivotally supported by the standard, said arm having a portion bent rearwardly to form an angle with the arm, a roller carried by the said portion, a slide bar, an arm connecting the slide bar with the crank axle, a hooked recess formed in the slide bar in which the said roller is adapted to lit, and means secured to the opposite end of the said arm 'for rotating the arm on its pivot to release the roller from the said recess so as to permit the ground working,` tool to fall.

2. 'ln an implement of the class described, the combination of a frame, a crank axle journaled in bearings transversely of the frame` ground wheels journaled on the axle, a ground working tool supported by the frame, an arm pivotally supported to a standard on the frame, the arm having` a portion bent rearwardly, and roller carried by the rearward bent portion in position to lit within a recess formed in a slide bar to hold the ground working tool in elevated position, and means for rotating` the arm on its pivot to release the roller from the said recess to permit the ground working tool to fall.

3. ln an implement of the class described, the combination of a frame. a crank axle journaled in hearings transversely of the frame, ground wheels journaled on the axle, a l@ground working` tool supported hy the frame, a ratchet wheel secured to each ground wheel, a pin carried by an arm secured to a stud portion of the crank axle in position to be moved into engagement with the teeth formed on the ratchet wheels. means for adjusting the angle of the arm relative to the arm of the crank axle, and means for releasing` the pins from engagement with the ratchet wheels at a predetermined point of rotation of the crank axle.

4. In an implement of the class described, the combination of a frame, a crank axle journaled in bearings transversely of the frame, ground wheels `iournaled on the axle, a ground working tool supported by the freine, a sliding bar pivotally secured to an urrn nioun'fed on the crank axle? a standard nionnted on die freine, nieans adjustably seenred to *alle sliding` bnr :ind adapted to engage the standardA and an abut-nient Carried oy the sliding bar und edjuseable with the seid adjueeble ineens for engegernen with ai rolle; pivotully supported by the Standard to hold the ground Workinglool in the lowered position.

In an implement` of the Class described, the Combination el a freine, e crank erle journaled in bearings rrensverseh7 of the freine, ground Wheels journnled on the axle, a ground Werl ng; lool supported by the 'freine9 i reicher, wheel Seenred to zr ground irlieeh an erin edjneiably secured to n stud portion of the Crank axle. a pin carried by the erin in posiion to be engaged with the ratchet Wheel, en actuating arm secured to the pin carrying arm, a slide bar, a recess forlned in the slide bar, a standard mounted on the freine, e pin supported by the standard :1nd adapted to be engaged Within the 'recess formed in the slide bar, an erin for pivotelly securing the slide bar to the Crank axle, ineens for releasing` the pin from engagement Within the recess Jfor permitting the freine to fell, and :i lexible connection between the actuating erin and Vllie pin releasing ineens, that eitlier the raising or releasing ineens may be actuated frein a eon'nnon ilexible eonneeion exending vlorward rorn the implement.

Signed et Los Angeles Californieu this 30th day of Jennery 1925. 1

HEBER TWJLK. 

